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A special $PCM$ system uses $32$ channels of data, one whose purpose is an identification (ID) and synchronization. The sampling rate is $4$ kHz. The word length is $5$ bits. Find the serial data rate.

  1. $1280\;kHz$
  2. $160\;kHz$
  3. $320 \;kHz$
  4. $640 \;kHz$
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Serial data rate = sampling rate x no. bits/frame = 4 kHz × 32×5 =   640 kHz.

 
option d

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